I have 4 original red Koni absorber (with the part number Edgar described) in my 530SX, the problem is that all 4 are for the back axle. I tried to get a pair of the front absorber without sucsess. But the rear absorbers are working fine on the front axle, without problems until now. If somebody has a pair of front absorbers I would like to buy them or change them against on pair of my back absorbers.